Improvement in pulley-blocks



I. STRUBEL.

PULLEY-BLOCK. No.188,'3.14, Patented March 13, 1877.

WITNESSES I INVENTOR: fivh. WU. lama W BY ATTORNEY UNITED S TEs PATENTOFFICE,

JOHN STRUBEL, OF GREEN POINT, NEW YORK.

IMPROVEMENT IN PULLEV-BLOCKS.

Specification forming part of Letters Patent No. 188,3 i4, dated March13, 1 877 application filed February 7. 1877.

' of New York, have invented a new and Improved Pulley-Block, of whichthe following is a specification:

The drawing represents a perspective view of my improved pulley-block.

This invention has for its object to produce a pulley-block for ordinarydomestic use and for marine purposes, on which the cheeks are so formedas to allow a knot in the rope to pass between the cheeks over thesheave. It frequently occurs that a broken rope cannot be readilyreplaced, and that it may be re tained in use by tying its ends; yet thepulley-blocks of ordinary construction do not permit a knot to passbetween the cheeks over the sheave, and prevent, therefore, in manycases, the use of a rope having a knot or knots.

My invention consists in spreading or bulging the cheeks of thepulley-block between the sheave and the suspension-loop, for the purposeof thereby obtaining an enlarged opening, which will permit a knot orknots to pass over the sheave.

In the drawing, the letters A A represent the cheeks of my improvedpulley-block. B

is the sheave, hung on the axle O, which has its bearings in the cheeksA. D is the sus pension-loop, applied to one end of the pulley block,for the purpose of attaching the same to a suitable support. Between thesheaveB and the suspension-loop D the cheeks A A, which may be made ofWrought or cast metal or other fit material, are bulged out to formgrooves a a, which should be substantially parallel to the edge of thesheave. These grooves, facing each other, as shown, form an enlargedpassage, through which any ordinary knot tied into the rope will beallowed to pass.

v The desired effect may be obtained by forming the groove a, in onlyone of the cheeks A, which plan will be preferably pursued on doublepulley-blocks having two sheaves, side by side. 7

I claim as my invention- A pulley-block whose cheeks A A are spreadapart between the sheave B and the suspension-loop D, to form alaterally-enlarged passage, a, substantially as and for the purposeherein shown and described.

JOHN STRUBEL.

' Witnesses: f

ERNEST O. WEBB, F. V. BRIESEN.

